Spring-tooth harrow.



Patented May 7, I901. C. S. SHARP.

SPRING TOOTH HARROW.

(Application filed Mar. 23, 1898. (No Mod m: -oams PETERS cu. wonmunu.wAsumomn. u c.

2 Sheets-Sheet l.

No. 673,788. Patented May 7, mm.

C. S. SHARP.

SPRING TOOTH HARROW.

(Application fllfld Mar. 23, 1899" (No Model.) 2 Sheets-Shoat 2.

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CHARLES S. SHARP, OF AUBURN, NEW YORK, ASSIGNOR TO D. MHOSBORNE A: 00.,OF SAME PLACE.

SPRlNG-TOOTH HARROW.

SPECIFICATION forming part of Letters Patent No. 673,788, dated May 7,190I.

Application filed March 23, 1899- To all whom it may concern;

Be it known that 1, CHARLES S. SHARP, of Auburn, county of Cayuga, andState of New York, have invented an Improvement in Spring-ToothI-Iarrows, of which the following description, in connection with theaccompanying drawings, is a specification, like characters on thedrawings representing like parts.

This invention relates to harrows, and has for its object to improve theconstruction of the harrow shown in United States Patent granted to me,No. 589,037, dated August 3, 1897.

In accordance with this invention the rearwardly-declining spike-teeth,which serve as trailing teeth in rear of the set of harrowteeth, aresecured to a pivoted cross bar, which is provided with means for rockingit and for holding it in a number of different positions, whereby saidtrailing teeth may be moved and held in several different positions bothin and out of contact with the ground, and forwardly-projecting arms aresecured to said cross-bar, to the forward extremities of whichbearing-wheels are journaled, which as said cross-bar is rocked aremoved bodily into and out of contact with the ground. The arms carryingthe bearing-wheels are adj nstably secured to the cross-bar and may beset in different positions relatively to the trailing teeth, so thatwhen the trailing teeth are raised to discharge trash or for any otherpurpose the bearing-wheels will be thrown into contact with the groundto thereby support the rear end of the barrow in elevated position atsuch time and to also regulate the depth that the barrow-teeth shallpenetrate the soil, a function which the trailing teeth inherentlypossess to a certain extent when in contact with the ground and thebearing wheels are elevated, provided, however, that the soil is quitehard. When the trailing teeth are thus raised and the bearing-wheelsbrought in contact with the ground, the harrow-teeth may also be raised,if desired, in order that the harrow may be transported upon the frontshoes and rear bearing-wheels, or the arms carrying said hearingwheelsmay be adjusted relatively to the trailing teeth, so that both thebearing-wheels and Serial No. 710,1l8. (N0 model.)

trailing teeth will be in contact with the ground, the bearing-wheels atsuch time supporting the rear end of the harrow and regulating the depthof penetration of both the barrow-teeth and the trailing teeth, and whenthe bearing-wheels and trailing teeth are so relatively adjusted themeans provided for holding them in fixed position may be released, ifdesired, and in such case the crossbar bearin g both the bearing-wheelsand trail ing teeth will be free to rock in its bearings, enabling thebearing-wheels and trailing teeth to follow the irregularities of theground. The soil. under certain conditions can be better operated uponby such adjustment of the parts.

Figure 1 shows in plan view a spring-tooth harrow embodying thisinvention comprising two sections; Fig. 2, a side view of one sectionthereof, a portion of the frame being broken away, showing the trailingteeth and bearing wheels both in contact with the ground and alsoshowing the setlever by means of which said trailing teeth andbearing-wheels are operated and locked in position; Fig. 3, a detailshowing the trailing teeth in contact with the ground and thebearingwheels elevated, the arms carrying said bearing-wheels beingadjusted relatively to the trailing teeth; Fig. 4, a detail showing thetrailing teeth and bearing-wheels adjusted relatively to each other asin Fig. 3, set, however, with the trailing teeth in elevated positionand the bearing-wheels in contact with the ground; Fig. 5, a detailshowing the trailing teeth and bearing-wheels set relatively to eachother as shown in Fig. 2, with the setlever released, whereby said teethand wheels are free to follow the irregularities of the ground; Fig. 6,a detail showing the trailing teeth in elevated position and thebearingwheels in contact with the ground, similar to Fig. 4:, althoughthe bearing-wheels are adjusted relatively to the trailing teeth so as 5to further limit the depth of penetration of the spring barrow-teeth;Fig. 7, adetailof one of the bearing-wheels borne by the trailingtoothbar; Fig. 8, a detail showing the c0nnection between the two sections ofthe harrow, and Fig. 9 a detail showing the adj ustable front shoe.

A represents the barrow-frame; a, a longitudinal bar attached at itsforward end to the front end of the frame and extending rearwardlythrough the middle of the frame.

1) represents the toothed bars, arranged transversely with relation tothe harrowframe and having their ends bent upward and pivotallyconnected to the side bars of the frame.

0 represents the barrow-teeth, which are socured to said bars I), therebeing as many as may be desired.

(1 represents the set-lever bar, which is connected with all of thetransverse tooth-bars b by links which are pivotally connected to themiddle bar a, and d is the set-lever.

The harrow so far described is of usual construction, and, as is wellknown, the spring harrow-teeth 0 may be operated by the setlever andheld so as to penetrate the soil to different depths and also may beheld in elevated position when the harrow is being trans ported.

e represents the front shoe.

A cross-bar f, which is herein shown as a bar of angle-iron, isjournaled at its ends in brackets f, secured to the rear ends of theside bars of the harrow-frame A, and said cross-bar f has secured toit,substantially midway its length, a set-'leverf the locking dog or pawl fof which engages one or another tooth of a quadrant f which is securedto the rear end of the middle bar a. The pivoted cross-bar f has securedto it a number of rearwardly-projecting teeth f which are herein termedtrailing teeth, and they are herein shown as long slender spike-teetharranged side by side in a row along the crossbar. Theserearward'lyprojecting trailing teeth may be secured to said cross-barfin any usual or suitable Way. The cross-barf may be operated by itsset-lever f and held in a number of different positions, six beingherein shown, and the trailing teeth may consequently be held in acorresponding number of diflerent positions, some in and some out of theground.

Arms g are secured to the front of the crossbar f, which projectforward, there being herein shown two forwardly-projecting arms securedto said cross-bar, one at or near each end thereof, although one or anumber of such arms may be provided,as desired. Theseforwardly-projecting arms g are adju'stably secured to the cross-bar fin any suitable manner; but for simplicity of construction a stand orbracket g is rigidly secured to the cross-bar, having a serrated side orface and having a hole through it, and one side of the arm g is alsoserrated, and said arm has a hole through it, and a bolt passes throughthe hole in said arm and through the hole in said bracket g, whichserves as a means of securing the arm to the stand or bracket. bolt maybe loosened and the arm set in a "number of different positions and thebolt The arm tothe stand or bracket in different positions relative tothe trailing teeth. Other ways, however, may be provided for thusadjustably securing the arms g to the cross-bar in lieu of that hereinshown.

At the forward extremities of the arms g bearing-wheels g are journaled,and the journals of said bearing-wheels are set in any one of a numberof holes formed or provided at the extremities of the arms, and thesebearing-wheels g are held in different positions relative to thetrailing teeth f by thus moving the bearing-wheels on the arms and alsoby adjustment of the arms bearing said bearing-wheels. As shown in Fig.3, the trailing teeth f are held in contact with the ground and thebearing-wheels g elevated, and with the parts in this position thetrailing teeth work in conjunction with and at the rear of the springharrow-teeth and incidentally serve as rear supports for the harrow,particularly when the soil is hard.

When it is desired to allow accumulating trash to escape, the set-leverf will be moved forward from the position shown in Fig. 3 and thetrailing teeth raised, as shown in Fig. 4, at which time thebearing-wheels g will be brought into contact with the ground and willserve as rear supports for the harrow, and said bearing-wheels will alsoat such time limit the depth of penetration of the spring-teeth.

When transporting the harrow, the trailing teeth f and bearing-wheels 9will usually occupy the position shown in Fig. 4, yet the spring-teeth 0will be elevated, aresult which may be accomplished by operating thesetlever d! If it is desired to limit the depth of penetration of thespring-teeth c farther than as shown in Figs. 3 and 4, the arm g,carrying the bearing-wheels g may be adjusted relatively to the trailingteeth, and one such adjusted position is shown in Fig. 6, and when saidwheels 9 are brought in contact with the ground the spring-teeth 0 willenter the soil but a short distance. In such case, however,the'set-lever f will be moved but two or three teeth in eitherdirection, and when the trailing teeth are brought in contact with theground and the wheels elevated said trailing teeth will only bemoved ashort distance and will occupy substantially the same level as thewheels did when'they were in contact with the ground.

If the condition of the soil is such that it is desirable both thebearing-wheels g and trailing teeth shall at the same time be brought incontact with the ground, then the arms g, carrying said bearing-wheels 9may be adjusted, as shown in Fig. 2, and then by looking the set-lever fin the position shown in said figure said bearing-wheels and trailingteeth will be thus rigidly held, both being in contact with the ground.With the parts in this position the bearingwheel g may be moved alongits arm by setting its journal in states a difierent hole, and whenmoved toward the end of the arm the pressure of the trailing teeth onthe ground will be lessened and when moved in the opposite way thepressure will be increased. If, however, the condition of the soildemands that both the bearingwheels and trailing teeth shall occupy aposi tion in contact with the ground, yet shall be free to followirregularities of the soil, then in such case the set-leverf may beunlocked, as represented in Fig. 5, by disengaging the dog or pawl fromthe toothed quadrant and then locking the hand-lever or operating deviceof said dog or pawl by means of a link or hook h, which is carried bythe set-lever.

The front shoe 6 is adjustably secured to the frame of the harrow inorder that it may occupy different elevations, and as a means of thussecuring said shoe to the frame I have herein provided a clamp 20, whichembraces the upper end of said shoe, and which is secured to the frameby two bolts 21, and said clamp has on its inner face a teat, whichenters or passes through a hole in the shoe. The shoe is formed orprovided with several holes, one above the other, any one of which willreceive said teat for the purpose of accomplishing vertical adjustmentof the shoe. By providing for adjustment of the front shoe as well asthe trailing teeth it will be seen that the slant of the spring-teethmay be altered when at work in the ground and wear of the teethcompensated for.

I claim- 1. In a harrow, a frame, a front shoe, a set of barrow-teeth,means for operating said set of harrow-teeth, a cross-bar pivotallyconnected to the barrow-frame, a set of trailing teeth secured to it,one or more arms also socured to said cross-bar having bearing-wheelsjournaled at their outer ends, and means for rocking said cross-bar onits axis and for holding it in a number of different positionsindependent of the harrow-teeth, to thereby simultaneously move thetrailing teeth and bearing-wheels independently of the harrowteeth,substantially as described.

2. In a barrow, a frame, a front shoe, a set of barrow-teeth, means foroperating said set of harrow-teeth, a crossbar pivotally connected tothe barrow-frame, a set of trailing teeth secured to said cross-bar andoperating in rear of the barrow-teeth, one or more for wardly-projectingarms adjustably secured to said cross-bar and bearing-wheels journaledat the forward extremities of said arms, and means for rocking saidcross-bar on its axis and for holding it in a number of differentpositions independent of the harrowteeth to thereby simultaneously movethe trailing teeth and bearing-Wheels independently of the harroW-teeth,substantially as described.

3. In a barrow, a frame, a front shoe, a set of harrow-teeth, across-bar pivotally supported at the rear end of the barrow-frame, a setof trailing teeth secured to it operating in rear of the barrow-teeth,means for operating said pivoted cross-bar and for holding it in anumber of difierent positions, and for releasing it, permitting it tofreely rock, and one or more forwardly-projecting arms secured to saidcross-bar and bearing-wheels journaled at the forward extremities ofsaid arms, substantially as described.

4. In a harrow, a frame, a set of harrowteeth borne by it, means foradjusting said teeth and for holding them in different elevatedpositions, a set of trailing teeth, means for adjusting said teeth andfor holding them in different elevated positions independent of thebarrow-teeth, one or more forwardlyprojecting arms movable with saidtrailing teeth, and bearing-wheels carried by them adjustable thereontoward and from the trailing teeth, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES S. SHARP.

Witnesses:

JAMES LETTIMORE, CARROLL K. GARDNER.

